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conferenceseries
.com
Joint Conference
July 17-18, 2017 Chicago, USA
International Conference on
DIAMOND AND CARBON MATERIALS & GRAPHENE AND SEMICONDUCTORS
Volume 6, Issue 6 (Suppl)
J Material Sci Eng, an open access journal
ISSN: 2169-0022
Diamond and Carbon 2017 & Graphene 2017
July 17-18, 2017
Preparation andmechanical properties of carbon nanotube reinforced aluminummatrix composites
H Erdem Çamurlu, Aynur Kazaz, M Ayşe Dere
and
Harun Evlek
Akdeniz University, Turkey
C
arbon nanotube (CNT) reinforced aluminum (unalloyed) matrix composites were produced by hot pressing powder
metallurgical technique. Composites containing 0.25 – 3 wt. % CNT were obtained. Mixing was performed both by
conventional ball milling (CBM) and high energy ball milling (HEBM). In CBM, which was performed solely for mixing
purposes, zirconia balls having 2 mm diameter were used and milling was conducted for 15 minutes. In HEBM, a Retsch
PM100 unit with tungsten carbide balls of 5 mm diameter was utilized, where mixing and grinding was conducted for 90
minutes at 150 rpm under argon atmosphere. Hot pressing of the composites was performed at 600
o
C for 30 minutes. Densities
of the obtained composites were over 97% of theoretical. In the microstructure of the composites obtained by CBM, carbon
nanotubes were in the form of agglomerates and clusters. Thus, it was seen that conventional mixing was not sufficient for
a good dispersion of CNT in Al. Hardness values were about 32.5 HB10 and did not change with the addition of CNT. 3
point bending strength of unreinforced sample was 295 MPa. There was a slight decrease in the strength and strain with
increasing CNT content. In the composites obtained by HEBM, CNTs were seen to be well dispersed in the microstructure
of the composites. Hardness was seen to be higher, as a result of the application of HEBM instead of CBM. Hardness of
unreinforced Al increased to 42.5 HB10. Hardness of the composite containing 3 wt. % CNT reached a hardness value of 81.5
HB10. 3 point bending strength values were about 320 MPa and were not affected by the addition of CNT. Strain values of the
composites were lower, as compared to unreinforced sample..
Biography
H Erdem Çamurlu has completed his PhD in 2006 from Middle East Technical University, Ankara, Turkey. Currently, he is an Associate Professor in the Mechanical
Engineering Department of Akdeniz University, Antalya, Turkey. He has published more than 35 papers in reputed journals.
erdemcamurlu@gmail.comH Erdem Çamurlu et al., J Material Sci Eng 2017, 6:6(Suppl)
DOI: 10.4172/2169-0022-C1-077